Yielding tool-holder.



A. FRITZ.

j YIBLDING Toor.l HOLDER. APPLICATION FILED .T AH. 28, 1911.

1,023,073. Patented Apr; 9, 1912.

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' UNITED sTATEs PATENT OFFICE.

ANDY FRITZ, OF PORTLAND, OREGON.

YIELDING- TOOL-HOLDER.

To all whom 'it may concern:

. Be it known that I, ANDY FRITZ, a citizen of the United States, and a resident of Portland, county of Multnomah, and State of Oregon, have invented a new and useful Improvement in Yielding Tool-Holders, of which the following is a specification.

This invention has for its object to provide a yielding tool holder of simple and strong construction, and adapted to permit the vtool to yield along a horizontal plane, while more rigidly holding the tool against movement in a vertical plane, since motion in the latter direction frequently causes injury to the part being machined, or the tool.

The construction and operation of my tool holder will be readily understood by having reference to the accompanying drawings constituting a part of the specificati-on.

In such drawings: Figure l is a side elevation of my tool holder, showing the same as having a tool aflixed therein, as in practice; Fig. 2 is a top view of my tool holder; Fig. 3 is a partial bottom View of my tool holder; and Fig. 4 is a sectional elevation lof the left end of my tool holder; the manner inwhich the tool is held being also illustrated in Figs. 2, 3 and 4.

My tool holder comprises a shank, a, curved at Z9 so as to provide a head Z, com-- prising a perpendicular part 0,' which is bent over against itself so as to provide a pendent member d. In the latter the tool e is secured. In order to properly hold the tool, the member Z is formed with a recess f, provided at the bottom with an oblique shoulder g. The member c is provided with a circular perforation 7L, in which is inserted a clamping screw z', for-med with a clamping head j having an oblique bearing face j. On the clamping screw z' is threaded a sleeve nut 7c. It will be noted that the sleeve nut is of lesser diameter than t-he circular aper-l bottom edges with a bevel; then the bottom edge will fit the oblique bearing face of the shoulder g, and the topbeveled edge of the tool will likewise t the oblique bearing face j of the head of the clamping screw z'.

Specification of Letters Patent.

Application filed January 28, 1911.

- Patented Apr. 9, 1912.

serial No. 605,342.

Vhen' the parts have been arranged as shown in Fig. 4, by setting up the nut 7c tightly against the inner face of the head member d, the tool is rigidly secured in place. W'hen so secured the holder, by reason of the construction described, permits it to have some motion along the horizontal plane, as illustrated by the arrows, pointing in opposite directions, below Fig. l.

The bottom of my tool holder is so constructed as to permit the tool post to be set close to the head Z of my tool holder, thereby preventing the vibration of the tool holder in a vertical plane, which usually is attended with injury either to the tool., or to the piece being machined. It is, furthermore, to be observed that the construction of my tool holder is so designed that it sets up close to the chuck, and therefore can be used to cut the stock, or piece being machined, flush with the chuck aws. Another advantage of my tool holder is, that it will not dig in nor chatter, but will cut a shaving of even thickness by reason of being held rigid close up to the work.

I claim:

l. A tool holder consisting of a body comprising a shank having formed at its headend a perpendicular member and the latter formed with an integral pendent member provided with tool holding means; said pendent member made with an aperture; a clamping screw inserted through such aperture and formed at its extremity to clamp thetool placed in said recess; the parts being adapted to permit the clamping screw to have lateral play in said circular aperture of the pendent member; and a sleeve nut threaded on the shank of the clamping screw and bearing against the inner face of said pendent member.

2. A tool holder consisting of a body comprising a shank having formed at its headend a perpendicular member and the latter formed with an integral pendent member provided with a tool holdingrecess; said pendent member made with an aperture; a

clamping screw inserted through such aperv. ture and formed at its extremity to clamp ber; and a sleeve nut threaded on the shank of the clamping screw and bearing against the inner face of said pendent member.

A tool holder consisting of a body comprising a shank having formed at its headend a perpendicular member and the latter formed with an integral pendent member provided with a tool holding recess formed at the bottom With a shoulder, and such shoulder formed with an oblique bea-ring` face; said pendentl member made with an aperture; a clampingscrew inserted through such aperture and formed at its extremity to clamp the tool placed in said recess; the

Copies of this patent may be obtained for extremities of said clamping screw formed With a clamping head made with an oblique bearing face; the parts being adapted to permit the clamping screw to have lateral play in said circular aperture of the pendent member; and a sleeve nut threaded on the shank of the clamping screw and bearing against the inner face of said pendent member.

ANDY FRITZ.

Witnesses GEGIL LONG, O. O. MARTIN.

ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

